Home / 39,383.72-54,348.84-21,478.76

Finding the Fourth Proportional to 39,383.72, 54,348.84 and 21,478.76

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Solution

The fourth proportional to 39,383.72, 54,348.84 and 21,478.76 is: 29,640.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,383.72 : 54,348.84 = 21,478.76 : x
  2. Step 2: Convert to fraction form
    39,383.72/54,348.84 = 21,478.76/x
  3. Step 3: Cross multiply
    39,383.72x = 54,348.84 × 21,478.76
  4. Step 4: Simplify right side
    39,383.72x = 1,167,345,690.64
  5. Step 5: Solve for x
    x = 1,167,345,690.64/39,383.72
  6. Step 6: Final answer
    x = 29,640.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.